Located in the heart of east Texas, the 153,179-acre Angelina National Forest is located in Angelina, Nacogdoches, San Augustine and Jasper counties. The forest lies in the Neches River Basin and on the north and south shores of Sam Rayburn Reservoir, a 114,500-acre lake on the Angelina River formed by the construction of Sam Rayburn Dam in the early 1960's.